Report on Pb-Sn based PSC with PCE ≥ 22% and roadmap to PCE ≥ 24% with long-term stability

This deliverable is related to T2.2 and will be achieved by combining the efforts of WP1 towards the increase of the material quality (increasing the crystallinity and decreasing the number of defects), with the best devices stack geometry and electron and hole transport layers developed in WP2. Overall the deliverable will pin point which steps should be made towards >24% efficiency in Pb-Sn perovskite devices.